Breaster-knife-grinding machine.



J. J. HEYS.v

BREASTER KNIFE GRINDING MACHINE.

APPLICATION FILED JULY 17,1906. 944,238. Patented Dec. 21, 1909.

2 SHEETs-SH3ET 1.

7 5 y 4 1 W Q. J Mn. J, flaf s J. J. HEYS. BREASTER KNIFEGRINDING'MAGHINE. APPLIOATION FILED JULY 17,1906.

Patented Dec. 21, 1909'.

2 SHEETS-SHEET 2.

VUNITED s rn'rns rnnn r nron.

JOHN J. KEYS, OF LY NN, MASSACHUSETTS, ASSIGNOR BY MESNE ASSIGNMENTS, T0THOMAS G. PLANT, OF..BOSTON, MASSACHUSETTS.

. BREAs'rER-KNIFE-GRINISING MACHINE.

Specification of Letters Patent. Patented Dec. 21, 1909.

Application filed July 1'7, 1906. Serial No. 826,537.

. ing 'blades or knives, particularly adapted (-on'tour for the heel.

for use in breasting machines designed to operate upon the heel breastsof boots and shoes. In certain aspects of, the invention,

however, it may be used in grinding blades or knives intended for otherpurposes as, for example, chisels and other tools.

The heel, as applied to a boot or shoe, is constructed of a series ofsuperposed layers having rough and uneven or overlapping edges whenpositioned. In the formation of the shoe. after the body of the heel hasbeen built up, the top lift is secured thereto, it being a layer ofleather having the proper The rounded or outer edge of the heel body isthen suitably shaved to conform to the shape of that portion of the toplift. The breast of the heel, to-' gether with that of the top lift isthen shaped by ablade or knife the face of which conforms to the shapeof the heel breast and the edge of which is shaped to conform to theshoe shank. The breast of the heel commonly concaved, although incertain. types of it is made strai ht. The shoe shank, to the form ofwhich t e edge of the knife should conform, is generally convex.

Thus, the blade or knife commonly employed in cutting or shaping theheel breast has a-convex face and a concave edge. 'So

'far as I am aware, no means have previously been devised to accuratelyor reliably and effectively grind a blade or knife so that the facethereof shall have the curvature of the heel breast onso that the edgeshall conform to the curvature of the shoe shank. In the practice of myinvention I am enabled to secure both of these results together withvarious other advantages and features which will be best understood froma descri tion of one embodiment or type o'f-ma'chine t ereof,illustrating my inventionpthe' same 'be- I ing shown in the accompanyingdrawings, wherein Figure 1 is a side elevation (the grind'ng wheel beingshown insection of a mach nc constructed in accordance wit my inventionand adapted to gl'ind-the face and edge of a knife into suitable formfor use in a heel breasting machine; the driving pulle s beof supportingand driving the grinding wheel; Fig. 3 is a detail showing in verticalsection the means for altering or adjusting the pivot-of-{the' spindleof the blade carrier to vary the curvature of the arc of traverse of theblade carrier; Fig. 4 is a side eleva tion (the machine frame beingshown partly in section) of the means for supporting the grinding wheel,the knife carrier being removed; Fig. 5 is a front elevation of aportion of the frame of the machine looking to the right in Fig. 1, andshowing a portion of the means for varying the projection of the bladecarrier during its traversing'movement; and Fig. 6 is an elevation ofthe ma-. chine and a portion of the frame thereof, looking somewhatdownward and to the right in Fig. 1-. i I

In the particular embodiment of my invention selected for illustrationhere and shown in the drawings, the frame of the machine (Fig. 1) isindicated at l, the same having a suitable base 2 and front,intermediate and rear uprights, 3, 1, and 5, respectively, projectingtherefrom. In the rear upright'IFigs. 2 and 4) a short shaft 6, is

journaled upon which is loosely mounted a lever 7 in the front arm 9(see Fig. 2) of which is mounted for rotation a spindle 11,

carrying at one end thereof a pulley 12, and at the opposite end thereofa grinding wheel 13 of any desired type but preferably a, frusto conicalemery wheel. Mounted loosely on the shaft 6 is a loose pulley 14,

also a fast pulley 15, adapted to be connected by belting with anysuitable source of power. Upon the opposite end of the shaft 6 issecured a pulley 16, adapted to be suitablyconnccted by a band with thepulley 12 u on the spindle 11 offth'e grinding whee whereby thelatter'may be rotated at any desired 5 eed,while at the same timepermitting said wheel to be oscillated verlically about'the axis of thepulley shaft 6.

v '10 the-rear endof the lever 7 (see Fig. 4)

is suitably connected a link 8, connected at its other or lower end toany sultable treadle or equivalent mechanism for raising and loweringthe grinding wheel at will.

1 Upon the .mrig'nt 5 and preferably adjacent the lever 7, (see Fig. 2and dotted lines Fig. 4) is a. horizontal arm 8 having thereon a setscrew 8"ada ted to engage a lug or projection 8 upon t .e forward end ofthe said lever 7, and to act as an adjustable stop to limit the upwardmovement of the emery wheel, so that even though too great pressure hebrought to bear upon the treadle, no injurious action results and thetemper of the blade'is not affected. By providing an adjustable stop anydesired degree of contact of the sharpening means and the blade can besecured.

The emery wheel may be secured upon the shaft 11 in any desired mannerand preferably see Fig. 1) by a nut and washer 17, so

that t e said wheel may be readily removed if desired. v

The blade or knife to be ground (see Fig.

1) is represented at 18, the same being secured to its support 19 in anydesired manner, as by means of a threaded-bolt 20 passing throughtheusual slot or openmg in the blade or 1ts permanent holder and into thesaid support 19. Upon the outer end of the threaded bolt is secured ahandled nut 21, 1 whereby the blade may be securely clamped in positionupon its support. The support 19 for the blade to be ground ispreferably inounted to slide longitudinally to and from the grinderinsuitable guide ways in a carrier 22, for a purpose to be more fullydescribed hereinafter. The carrier 22 (see Fig.1) is preferably mountedto slide transversely on a dovetailed head 23 of a spindle '24, thelatter'resting at its lower end when not in' operation upon a suitablestep or base 25'projectingupwardfrom or secured upon the frame 1 ofthemachlne. This;

sliding capacity is availed. of only'when grinding flat blades, at allother times it is prevented by a spring pin or lock 23 entering saidsupport; y

The grinding. wheel or element and the I blade support are adapted tohave a relative bodily traverse imparted thereto, and preferably thistraverse is in a curved path or are. In that embodiment of my lnventlonherein shown I have chosen to traverse the blade support with respect tothe grinding '1' preferably alsoprovide means to alter or change thecurvature of the said element.

are of traverse, to'suit. the curvature of the heel breast, in differenttypes of boots and shoes as has been; previously referred to. As oneembodiment of means to provide capacity for such are ,of traverse ofthe" blade-support, the spindle 24 is adapted to receive a rockingmovement upon .a horizontal axis or (pivotalpoint adapted to be shiftedlongitu i the curvature of the arc of oscillation. To

this end, there is provided (5% Figs. 1 and L ing spindle 24 and hasmounted in its opposite faces (Figs, '1 and 6) spring pressed pins 33adapted to enter positioningsockets in said spindle. In Fig. 1 theseries of sockets 35 extending throughout the greater portion of thelength of one face of the spindle are shown in full here while-in theopposite face of the said spindle 24.- is protoo closely and withoutmaking them unnecessarily small. In order to pro erl'y position thepivotal point "of the spindle, 24, the handled nut 37 (see. Figs. 1and'3) upon the outer screw threaded end of the spindle is loosened andthehead'29 of the spindle is shifted in the guide 28 to the I. desiredposition, carrying therewith the.

yoke 32, one of the pins 33 being projected by its springinto thatsocket 35 or-36 with which the pin has been brought into alinement,thereby securin the pivotal support for the'spindle at the esiredposition.

as has been previously stated, the blade ',is, designed to cut aheelbreast which is ordinarily concaved and to that end the :bliide isprovided with. two faces respectively concaved and convexed. In Fig. 1the blade is represented as positioned with its concave face in contactwlth the rinding wheel. \Vhen it is desired to grind a blade [Whosefaces shall have a curvature of the desiredarc ofa curv'ed heel breast,the blade having been secured in position, is in this embodiment of myinvention rocked back and forth about'the pivot stud 30 as a center,past the face of the grinding wheel by any convenient and suitable meanspreferably by the operative who grasps any convenient portion of therocking part. It, is apparent that the curvature of the are representedby the inneror concave face of the blade is dependent upon the length ofthe. radius pertaining to su'ch are. If, therefore, the

s indle 24 or ot-her equivalentsupport for t e bIade were rockedupona.permanent or nally of the spindle to vary 7 vided a second series ofsockets 36, which are shown as intermediate the sockets 35 so I that thedesiredfinene'ss of adjustment may be'secured without spacing the saidsockets the curvature of the. face of the blade would necessarily beinvariable. By altering the radius referred to, the curvature of travel'of the blade may be made to correspond with that of the concave face ofthe blade.

It is obvious that the said radius may be the arc represented by theblade of the knife falls within the scope of the invention. In practicethe sockets upon the sides of the depending spindle will be marked oridentified by characters indicating the different radii of oscillationsininehes so as to facilitate quick adjustment to any blade presented.Thusfor example the yoke will be adjusted to the socket marked 6 for ablade of 6" radius.

If it be desired to grind a blade having a flat face to operate "upon astraight heel breast, itis clear that such blade should be traversedpast the grinder in a straight line instead of a curved line asdescribed. To this end and to engage the lower end of the dependingspindle 2% I have preferably pivoted in suitable ears 26 projecting fromthe machine frame a catch 27, an edge ofwhich in the position shown infull lines in Fig.

- 1 is adapted to engage a corresponding slot or groove in saidspindleQd to hold the same against oscillation and at the same time thespring latch 23 at the head of the spindle is released to free thedovetailed slide 22 and permit it 'to slide freely on the now stationarydovetailed head '23. My machine is therefore conveniently adapted togrind said. shank. Inasmuch as the latter is ordinarily convex, it. isusually necessary to provide a kmfe with a concave edge. I have devisedmeans for forming such an edgewhether having curved or flat face andpreferably do so while grinding the face thereof, although it is obviousthat the two operations may be entirely distinct and carried on indifferent machines orat different-times.

The embodiment of means here represent-- ed includes devices actingduring the relative movement or traverse ,of the grinding mechanism andtheblad'e to modify the traversing movement by, altering during suchmovement the amount of projection of he blade support to conform to thegrindi g edge of the blade with respect to the grinding wheel, and alsomeans to adjust or vary the action of such traversing movement modifyingmeans. That is to say, and viewing the mechanism shown in Fig. L'byprojecting the blade 18 forwardly toward the grinding wheel to a'minimumextent at the beginning of. the rocking movement of the spindle 24 andincreasing such projection v toa maximum extent at the middle of therocking nmvement, and then correspondingly reducing the same to aminimum again it is apparent that a concaved edge will be imparted tothe said blade. Although I have stated that the blade may be projectedto a minimum and then to a maximum extent toward the active face of thegrinding wheel, such expression is used in; abroad sense andcontemplates the relative projection of the blade toward the grindingWheel. That is to say, it is within the scope of the invention toproject the grinding wheel in the described-manner toward the blade.

In that embodiment of my inventionwherein the blade is rejectedtowardthe grinding wheel, I pre er to connect an end of the blade support bymeans of a radius arm, with a fixed though adjustable point of support,so that during the of the spindle 24 upon its pivot the said sup ortshall receive the forwardand back sli ing movement. to produce the curveof the cutting edge. As one form of mechanism to suitably connect theblade support in the described manner, upon the upright 3 of the frameof the machine is a stud 38 upon which is mounted (see Fig. 1) a bellcrank lever 39, the lower arm 40 of which has mounted therein a pin 41,preferably spring pressed (see F1g. 5) the said pin being adapted toengage the proper one of the series of sockets 42'suit ably formed inthe ,framework of the machine. The upper arm of the lever 39 haspreferably formed thereon a rounded head 43 so as to form a ball andsocket joint with the socket 445 that is adjustably secured to theradius arm 45 b means of a threaded bolt 46 passing throng (see Fig. 5)a slot 46' in said arm, and having mounted upon the up r end thereof aport I have preferably formed 11 n the inner end of the radius arm aronn ed head 48 adapted to engage asuitable near the end of the bladesupport. It is obvious that the'efiective length of the radius arm maybe altered by providing instead Amadjustable connection between thesaute and theblade carrier. By the described mechanelement, or, in otherwords, to position the ism Iii/is apparent that in the-reciprocation,

is. handled nut 4!? whereby t e socket 44; may' to couple the radius armwith the blade supor in the rocking or oscillation of the spindle 1 edgeof the blade. The radius of this move-" ment and consequently theconcavity of the knife edge may be varied at will by adjustment of thearm LO-of the bell crank. I may omit or disconnect the describedmechanism to vary the amount of projection of the blade support relativeto the emery Wheel, that is to say, the radius arm 45 or its equivalentand the parts connected therewith, to

modify the traverse of the-blade support in the manner previouslydescribed, and yet secure thevproper grinding of the concave face andthe concave edge of the blade simul: taneously, by imparting a relativetraverse to the carrier of the blade support and the grindin whereo isless than that of-the arc represented by the concave face of the blade.In

other words, if for example the blade he what is known as a six inchblade, or one the radius of whose arc is six inches, I may rock theblade carrier thereof in an arc of a somewhat less radius, and therebycorrectly grind both the concave face and concave edge of the blade. Insuch relative traverse of the blade support and theemery wheel, a bladerepresenting a certain arc is rocked upon a I I pIlSlIlg curvedsharpening means, a blade! shorten than the true radius, with the resultthat the emery wheel is brought intosuch deep relation with the blade asto enter into and grind. the concaved edge thereof while grinding theconcaved face.

Although in setting forth this embodiment of the invention the same is secifically described, I Wish it to be clear y understood thatdescriptive terms are used in their generalsense and not intheirspecific nature,

I and, that the scope of the invention .is set forth in the followingclaims I 1. A blade sharpening mechanism oomprisin sharpening means, ablade support,

said s arpening means and? blade support having capacity for relativetraverse, and

means acting continuously during the trav ersing movement to vary therelative position-of projection of theblade supportand sharpening means.

2A blade sharpening mechanism comprising curved sharpening means, ablade support constructed and arranged to support the blade with itscutting edge extending in the direction of curvature of saidsharpeningmeans, said-blade support having capacity for traversing movement withrespect to said sharpenin means, and traverse modif ing means includinga member having a xed point of support and connected to the bladesupport to impartto the blade varyingpo: I sitions of projection-towardthe sharpening meansdurmg the traversing movement.

means upon an arc the radius fying means to project the blade support inthe plane thereof toward the sharpening means in a curved path duringsaid traversing movement.

4. A blade sharpening mechanism comprising sharpening means, a bladesupport,

said blade support and sharpening means having-ca acity for relativetraverse, traverse mOdI mg meansactmg continuously durlng the traversingmovement to alter the so amount of projection of, theblade supportrelatively to the sharpening means and action varying means to vary theaction of said traverse modifying means.

blade sharpening mechanlsmj comprising curved sharpenmg means, a bladesup ort constructed and arrang'edto support the lade with its'cuttingedge extending in the direction of curvature of said sharpening means,said blade support havingfcapacity.

for traversing movement with respect to said sharpeninsupport'constructed and arranged to support the bladewith its cuttingedge extending in the direction of curvature of said sharpening means,and traverse'modif ingf means mc udmg a member having a xed means, apivotal base for said support where on the same may be bodilytrayersedin an are relatively to said sharpeninlg means, and

to alter the curvature o said 'iiic'. i

'5'. A blade sharpening t-me chamsm cone prising curved sharpeningmeans, a blade means to adjust the said ivfitafbase, thereby 3 supportconstructed and arranged to support the blade with itscutting edgeextending in the direction of curvature of said sharpening means and arecontrolled traversing means to impart Felative bodily traverseto saidblade, support and sharpenmg means ina curved path. y f

8. blade sharpening mechanism. comllf) prising curved sharpeningmeans',=a bladev support constructed andjarrangedto support the bladewith'its cutting edge 'eiiten-ding in the direction of curvature ofsaid"Sharpe'n'ing means, are controlled traversingmeans to impartrelative bodily traversctoflf's (1 blade support and sharpcnin meansinj'ia icurved path',.-an d traverse modifyin means to' alterthe'ainount of projection ofthe blade suport relative to said sharpeningmeans dun mg saidtraverse.-

9. A blade sharpening mechanism comprising sharpening means,'a bladesupport,

are. controlled traversing means toi impart bodily traverse to saidblade support in a curved path with respect to said sharpening means,and traverse modifying means to project said blade support toward thesharpening means in a curved path during said traverse. a I

10. A. blade sharpening mechanism comprising sharpening means. a bladesupport,

' said sharpening means'and blade support having capacity for relativetraverse, and

. means, acting continuously during said traversing movement, torelatively project said blade support and sharpening means toward eachother in-a direction at an angle to that of the traversing movement.

11. A blade sharpening mechanism comprising sharpening means, a bladesupport,

.said sharpening means and blade support having ca pacity for relativetraverse, and traverse modifying means acting during the traversingmovement to modify such traverse in a plurality of directions.

12. A .blade sharpening mechanism comprising sharpening means, a bladesupport,

said sharpening means and blade .support having capacity for reative'traversc, traverse modifying means acting during the H. )e-bladesharpening mechanism com prising a curved sharpening means, a bladesupport constructed and arranged to support the blade with its cuttingedge extending in the direction of curvature of said sharpening means,said sharpening means.

and blade support having capacity for relative traverse movement,traverse modifying movement means acting during said traverse to alterthe amount of projection of the blade support and sharpening means,means to manually control one of said movements, and means toautomatically control the. other of said movements.

15. A. blade sharpening mechanism comprising sharpening means, a bladesupport, said sharpening means and blade support having capacity forrelative traverse, and means to move relatively the sharpening means andblade support to bring the sharpening means into sharpening relationindependently of said relative traverse.

16. A blade sharpening mechanism comprising curved sharpening means, ablade support constructed and arranged to support the blade with itscutting edge extendinginthe direction of curvature of saidsharieningmeans, said sharpening means and lade support having capacity forrelative traverse, and automatic means acting during said traversingmovement to alter the relative position of said sharpening means andblade support.

, 17. A blade sharpening mechanism comprising curved sharpening means, ablade support constructed and arranged'to support the blade with itscutting edge extending in the direction of'curvatureof said sharpeningmeans, said sharpening means and blade support having capacity forrelative traverse .and automatic means acting during said traversingmovement to alter the path thereof.

18. A grinding mechanism comprising curved sharpening means, a bladesupport constructed and arranged to support the blade with its cuttingedge extending in the direction of curvature, of said sharpening means,said sharpening means and blade support having capacity for relativetraverse movement. and automatic means to vary during the said traversemovement the line of relative travel of the edge of the blade mounted inthe support.

it). A grinding machine comprising sharpening means a. blade support,means for moving the said sharpening means towardthe blade support, anddevices for controlling the extent ot such movement that any desiredcontact with the member to be sharpened can, be efl'ected with a view ofretaining the temper of the blade being ground or sharpened. Y

20. A concave blade sharpening mechanism comprising curved sharpeningmeans, a blade support constructed and arranged to support the bladewith its cutting edge extending in the direction of curvature of saidsharpening means and means for imparting a relative bodily traverse tosaid sharpening means and said blade support in a curved path the radiuswhereof is other than that represented by the concave face of the blade.

21. In a breaster knife grinding machine, the combination of a grinderhaving a curved edge, means for operating the grinder, a knife holderfor supporting a knife having a concaved cutting edge extending in thedirection of curvature of the" grinder and partially enveloping thesame, and means for changing the relative position of the knife andgrinder to enable the latter to simultaneously grind the curved edge andconcaved face of the knife.

22. In a breaster knife grinding machine, a grinder having a curvedsurface, a swinging knife holder arranged to support the knife with itsedge extending in the direction of curvature o'f said grinder, and withits concaved face 'enve1op1ng said curvature and means to alter theeffective radius on "which said holder swmgs.

5 controlling said movement adapted to per- W itnesseszf I 23.Abreusterknifegrindingmachinecolm 1 In testimony whereof, Iha\'e'signec1 my risin a grinder, a knife support mountecl name to thisspecification, in the presence of.

or movement about the grinder to grind two SUbSCIIbIIIg WItIIGSSGS.

the concaved face of the knife, and means J OHN J HEYS;

mit the concavelycurved edge of the knife SIDNEY F. SMITH, to besimultaneously ground. 7 ROBERT H. :KAMMLER;

